.box {
  width: 400px;
  height: 400px;
  color: red;
  background-color: orange;
  font-size: 30px;
  line-height: 50px;
}
.xxoo {
  width: 400px;
  height: 400px;
  color: purple;
  background-color: pink;
  font-size: 20px;
}
h1 {
  width: 400px;
  height: 400px;
  color: blue;
  background-color: #37c01b;
  font-size: 50px;
}
